Allegheny Observatory

The observatory of the University of Pittsburgh, located
in Riverview Park, Pennsylvania, 10 miles northeast of the main university
campus. For most of the 20th century and up to the present, this facility
has specialized in astrometric observations and its primary research goal
continues to be high-precision astrometry,
particularly as applied to extrasolar planets.
One of its principal researchers, George Gatewood,
announced in 1996 the preliminary finding of a planetary system around the
nearby star Lalande 21185 (a result
that has since come into serious question).